NDLI: A hybrid quantum-classical model for transport in tunneling heterostructures

Content Provider	IEEE Xplore Digital Library
Author	Fernando, C.L. Frensley, W.R.
Copyright Year	1993
Description	Author affiliation: Erik Jonsson Sch. of Eng. & Comput. Sci., Texas Univ., Richardson, TX, USA (Fernando, C.L.; Frensley, W.R.)
Abstract	Several models have been developed to evaluate the current-voltage characteristics of the resonant tunneling diode (RTD). The current density predicted by both flat-band model and Thomas-Fermi approximation (or zero-current model) fails to reproduce the experimental results. We believe that this disagreement is due to the assumption of perfect electron coherence in the tunneling theory. An adjusted Thomas-Fermi model which includes a series resistance at either of the contact layers has been tried out, but the result is still unsatisfactory. A hybrid quantum-classical approach is suggested to evaluate self-consistently the electron current. The method couples the quantum-tunneling current obtained by solving the Schrodinger equation in the tunneling region with the classical drift-diffusion current in the contact layers. The resulting current continuity equation is solved self-consistently with Poisson's equation. It shows that the hybrid quantum-classical model gives much more realistic I(V) curves than other models.
Starting Page	152
Ending Page	158
File Size	274549
Page Count	7
File Format	PDF
ISBN	0780308948
DOI	10.1109/CORNEL.1993.303081
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1993-08-02
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Predictive models Electrons Poisson equations Current-voltage characteristics Resonant tunneling devices Diodes Current density Coherence Contact resistance Schrodinger equation
Content Type	Text
Resource Type	Article

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